Repotting guide

When & how to repot Garlic Bignone (Cydista aequinoctialis)

Also called Garlic Bignone, Garlic Vine, Bejuco Colorado, Vaquero Blanco.

More about garlic bignone

About Garlic Bignone

Cydista aequinoctialis · also called Garlic Bignone, Garlic Vine · tropical

A compact, garlic-scented evergreen Bignoniaceae vine from tropical South America and the Caribbean, bearing funnel-shaped flowers that open purple-lavender and fade through lavender to near-white. Blooms twice annually. Ideal for tropical gardens on trellises or arbours. Hardy only in frost-free zones 10–12; grow under glass elsewhere.

Mature size: 1.8–2.4 m (6–8 ft) tall in most garden settings; can be kept to this with annual pruning after flowering

How to tell garlic bignone needs repotting

Repotting on a calendar is less reliable than reading the plant. For garlic bignone, watch for these signs:

Roots poking out of the drainage holes or coiling visibly around the inside of the pot.
You are watering far more often than you used to because the rootball dries out within a day or two.
Water runs straight through and out the bottom without soaking in.
Top growth has slowed or new garlic bignone leaves are noticeably smaller than older ones despite good light.

For the underlying biology of a pot-bound root system and why it stalls a plant, see our guide to spotting and fixing a root-bound plant.

How often to repot garlic bignone

Every 12–18 months — sooner if roots show fast. Garlic Bignone's growth habit — compact, evergreen tendril-climbing vine; leaves divided into two leaflets with a possible terminal tendril; produces garlic odour when foliage is bruised — sets the pace. A compact, garlic-scented evergreen Bignoniaceae vine from tropical South America and the Caribbean, bearing funnel-shaped flowers that open purple-lavender and fade through lavender to near-white. Blooms twice annually. Ideal for tropical gardens on trellises or arbours. Hardy only in frost-free zones 10–12; grow under glass elsewhere.

What size pot to step garlic bignone up to

Step up one pot size — about 2–3 cm (an inch) wider. Garlic Bignone grows fast, so it will fill that space within a season, but jumping several sizes at once still backfires: the unused soil stays soggy and rots even a vigorous root system. One size at a time, every year or so, is the rhythm.

Not sure of the exact diameter? Our pot size calculator takes the current pot and root spread and tells you the right next size — it deliberately recommends a single step up, never a big jump.

The best time of year to repot garlic bignone

Early spring, just as new growth restarts, is the ideal window for garlic bignone. The plant is moving into its strongest growth phase and re-roots into fresh soil quickly. Avoid repotting in winter dormancy or, for flowering plants, while it is in bud or bloom — recovery is slowest then and you risk dropping the flowers.

Step-by-step: repotting garlic bignone

Time it for spring. Repot garlic bignone in early spring as growth restarts so it re-roots quickly into the fresh soil.
Choose one size up. Pick a pot about 2–3 cm wider with drainage holes. One step only — a much bigger pot stays soggy and rots roots.
Ease the plant out. Water lightly the day before, then tip garlic bignone out and gently loosen any roots circling the bottom of the rootball.
Repot at the same depth. Put a layer of fresh well-drained, fertile soil; loam or sandy loam in the new pot, set the plant so its soil line is unchanged, and backfill, firming lightly.
Water and pause feeding. Water once to settle the soil. Hold off fertiliser for about a month — fresh mix already has nutrients and feeding now burns new roots.

Aftercare

Water garlic bignone once to settle the soil, then let the surface dry before watering again — fresh mix around the roots stays wetter than the old compacted ball, so the commonest post-repot mistake is overwatering. Keep it out of direct sun for a week or two while roots re-establish. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for garlic bignone

Garlic Bignone wants well-drained, fertile soil; loam or sandy loam. Performs best in moderately fertile, free-draining soils. Tolerates average garden soils provided drainage is adequate. In containers, use a quality loam-based compost with added grit. Avoid heavy, poorly aerated clay. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting garlic bignone — frequently asked questions

How often should you repot garlic bignone?

Every 12–18 months — sooner if roots show fast for garlic bignone. Repot garlic bignone roughly every 12–18 months, in early spring as growth restarts. It grows fast and circles its pot quickly, so step up one size (about 2–3 cm wider) into fresh well-drained, fertile soil; loam or sandy loam. Don't jump several sizes — that soggy excess soil is what rots vigorous roots.

What size pot does garlic bignone need?

When is the best time of year to repot garlic bignone?

Can you put garlic bignone straight into a much bigger pot?

No. Even a fast-growing garlic bignone should only go up one pot size at a time. A vastly oversized pot holds a reservoir of wet soil the roots cannot reach, which stays cold and soggy and rots the roots — the opposite of what you wanted.

Should you fertilise garlic bignone after repotting?

Not immediately. Wait about 4 weeks after repotting garlic bignone. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.